Greenheck DFD Series Installation, Operation And Maintenance Manual page 29

®
Installation, Operation and Maintenance Manual
Please read and save these instructions for future reference. Read carefully before attempting to assemble, install,
operate or maintain the product described. Protect yourself and others by observing all safety information. Failure
to comply with these instructions will result in voiding of the product warranty and may result in personal injury
and/or property damage.
Tools Required:
Hammer
⁄ in. driver
5
16
Electric drill
⁄ in. drill bit
9
16
⁄ in. wrenches (2)
7
16
Item Qty Description
1 1 Manual Quadrant
2 1 Bolt
3 1 Flat washer
4 1 Hex nut
5 1 Wing nut
6 1 Axle pin
7 1 Axle clip
Installation Instructions Without Standoff Bracket
1. Install the damper in the duct. Place fasteners so that
they do not interfere with operation of the blades.
The end of the blade that has the lances will accept
the quadrant drive pin. Place that side of the damper
on the side of the duct where the quadrant is to be
located.
2. Cut a hole through the duct over the lanced blade
axle bearing. The hole should be large enough for
the axle pin to slide through (approximately
diameter).
3. Slide the axle pin through the quadrant. Align the
quadrant pointer with the blade as shown and then
insert the pin into the damper blade lances.
4. Pound the axle pin into the damper blade until the
quadrant is approximately ¾ in. (19mm) away from
the duct.
5. Rotate the quadrant and blade until the blades are at
the full closed position. (The quadrant pointer will be
approximately perpendicular to the centerline of the
duct).
®
Quadrant
Pointer
Part Number
475679
415034
416206
6
415455
415885
454136
7
451890
5
⁄ in.
9
16
1½ in. or 2 in. Standoff Brackets and
4
1
3
6. While holding the quadrant and blade in the closed
position and using the end of the outer quadrant arc
as a guide, drill a ¼ in. (6mm) diameter hole through
the duct. Drill the hole at the end of the arc that is
furthest from the quadrant pointer.
7. Rotate the quadrant out of the way and insert the
bolt from the inside of the duct. Secure the bolt to
the duct using the hex nut.
8. Rotate the quadrant and blade back and position
the quadrant over the bolt. Apply the flat washer and
wing nut onto the bolt.
9. Pound the axle pin into the blade until the axle clip is
within ⁄ inch (3mm) of the quadrant.
1
8
10. Using the quadrant lever, cycle the damper while
checking for proper operation. Verify that the
blade is free floating within the frame. Resolve any
interference issues that prevent smooth operation.
11. Set the damper blade to the desired position and
tighten the wing nut.
Document 476321
MBD-10
Manual Quadrant
2
MBD-10 1